001 /*****************************************************************************
002 * Copyright (C) PicoContainer Organization. All rights reserved. *
003 * ------------------------------------------------------------------------- *
004 * The software in this package is published under the terms of the BSD *
005 * style license a copy of which has been included with this distribution in *
006 * the LICENSE.txt file. *
007 * *
008 * Original code by Paul Hammaant *
009 *****************************************************************************/
010
011 package org.picocontainer.monitors;
012
013 import static org.picocontainer.monitors.ComponentMonitorHelper.ctorToString;
014 import static org.picocontainer.monitors.ComponentMonitorHelper.format;
015 import static org.picocontainer.monitors.ComponentMonitorHelper.memberToString;
016 import static org.picocontainer.monitors.ComponentMonitorHelper.methodToString;
017 import static org.picocontainer.monitors.ComponentMonitorHelper.parmsToString;
018
019 import java.io.PrintWriter;
020 import java.io.Writer;
021 import java.lang.reflect.Constructor;
022 import java.lang.reflect.Member;
023 import java.lang.reflect.Method;
024
025 import org.picocontainer.ComponentAdapter;
026 import org.picocontainer.ComponentMonitor;
027 import org.picocontainer.MutablePicoContainer;
028 import org.picocontainer.PicoContainer;
029 import org.picocontainer.Injector;
030 import org.picocontainer.Behavior;
031
032 /**
033 * A {@link ComponentMonitor} which writes to a {@link Writer}.
034 *
035 * @author Paul Hammant
036 * @author Aslak Hellesøy
037 * @author Mauro Talevi
038 */
039 public class WriterComponentMonitor implements ComponentMonitor {
040
041 private final PrintWriter out;
042 private final ComponentMonitor delegate;
043
044 public WriterComponentMonitor(Writer out) {
045 this(out, new NullComponentMonitor());
046 }
047
048 public WriterComponentMonitor(Writer out, ComponentMonitor delegate) {
049 this.out = new PrintWriter(out);
050 this.delegate = delegate;
051 }
052
053 public <T> Constructor<T> instantiating(PicoContainer container, ComponentAdapter<T> componentAdapter,
054 Constructor<T> constructor) {
055 out.println(format(ComponentMonitorHelper.INSTANTIATING, ctorToString(constructor)));
056 return delegate.instantiating(container, componentAdapter, constructor);
057 }
058
059 public <T> void instantiated(PicoContainer container, ComponentAdapter<T> componentAdapter,
060 Constructor<T> constructor,
061 Object instantiated,
062 Object[] injected,
063 long duration) {
064 out.println(format(ComponentMonitorHelper.INSTANTIATED, ctorToString(constructor), duration, instantiated.getClass().getName(), parmsToString(injected)));
065 delegate.instantiated(container, componentAdapter, constructor, instantiated, injected, duration);
066 }
067
068 public <T> void instantiationFailed(PicoContainer container,
069 ComponentAdapter<T> componentAdapter,
070 Constructor<T> constructor,
071 Exception cause) {
072 out.println(format(ComponentMonitorHelper.INSTANTIATION_FAILED, ctorToString(constructor), cause.getMessage()));
073 delegate.instantiationFailed(container, null, constructor, cause);
074 }
075
076 public Object invoking(PicoContainer container,
077 ComponentAdapter<?> componentAdapter,
078 Member member,
079 Object instance, Object[] args) {
080 out.println(format(ComponentMonitorHelper.INVOKING, memberToString(member), instance));
081 return delegate.invoking(container, componentAdapter, member, instance, args);
082 }
083
084 public void invoked(PicoContainer container,
085 ComponentAdapter<?> componentAdapter,
086 Member member,
087 Object instance,
088 long duration, Object[] args, Object retVal) {
089 out.println(format(ComponentMonitorHelper.INVOKED, methodToString(member), instance, duration));
090 delegate.invoked(container, componentAdapter, member, instance, duration, args, retVal);
091 }
092
093 public void invocationFailed(Member member, Object instance, Exception cause) {
094 out.println(format(ComponentMonitorHelper.INVOCATION_FAILED, memberToString(member), instance, cause.getMessage()));
095 delegate.invocationFailed(member, instance, cause);
096 }
097
098 public void lifecycleInvocationFailed(MutablePicoContainer container,
099 ComponentAdapter<?> componentAdapter, Method method,
100 Object instance,
101 RuntimeException cause) {
102 out.println(format(ComponentMonitorHelper.LIFECYCLE_INVOCATION_FAILED, methodToString(method), instance, cause.getMessage()));
103 delegate.lifecycleInvocationFailed(container, componentAdapter, method, instance, cause);
104 }
105
106 public Object noComponentFound(MutablePicoContainer container, Object componentKey) {
107 out.println(format(ComponentMonitorHelper.NO_COMPONENT, componentKey));
108 return delegate.noComponentFound(container, componentKey);
109 }
110
111 public Injector newInjector(Injector injector) {
112 return delegate.newInjector(injector);
113 }
114
115 /** {@inheritDoc} **/
116 public Behavior newBehavior(Behavior behavior) {
117 return delegate.newBehavior(behavior);
118 }
119
120
121 }